Sink



FIG. 1 is a top plan view of the sink;

FIG. 2 is a bottom plan view of the sink of FIG. 1;

FIG. 3 is a front elevational view of the sink of FIG. 1; and,

FIG. 4 is a side elevational view of the sink of FIG. 1. 

The design for a sink, as shown and described. 